Apparatus for preparing infusions.



F. A. GAUGHGQ APPARATUS POR PREPARING INFUsIoNs.,

APPLICATION FILED :MARt 19,1908.

Patented Nov. 23, 1909.

' I Siiljilil@ Il i FREDERIC A. C AUCHOIS, 0F Ht-'i7 YORK, N.

APPARATUS FOR PREPARING- IMFUSIONS.

l yatented Nov. 23, i909. Application led March 1B, 3.908. Serial No. 422,000.

Specification of Lettersvatent.

To all whom it may concern.:

with a metallic rim or hoop at its upper end,

Be it known that I, FREDERIC i-I.CaUoHois, by means of which it is sustained in the a citizen of the United States of America, upper portion of the urn; l is an Ainlet pipe residing in the city, county, and State of for admitting hot waterto the receptacle so 5 New Iork, have invented certain new and 5 is a pipe leading to a pump (i, operauseful Improvements in Apparatus for Ihetively connected to a motor 7; the discharge paring Infusions, of which'the following is from the pump being through a pipe 8, and a specification.` a gage glass 9, which forms a continuation This invention relates to certain new and 0f the discharge passage into the recep- 55 lo usefulimprovements in apparatus for pretacle 3.

paring infusions, particularly to coffee urns At l0, I prefer to provide a rose or spray and the like; the principal object. being to nozzle for the discharge pipe, but this is not secure a general increase of efficiency over absolutely essential; ll is a branch outlet that obtainable in the devices heretofore terminating in a faucet l2 for withdrawing 70 used for the purpose. the contents of the urn. f

While the improvements are primarily It will be seen that in the operation of the intended for use in the preparation of the inpump, the liquid will be forced up the dis- ,fusion of coffee, and the drawing and decharge channel into the receptacle 3, from scription particularly) show an apparatus which it drips or percolates again into the 75 2o for that purpose, it will be seen that such is urn.

'only one of many uses of which the im- The apparatus is particularly well adaptproved apparatus is capable. ed for the preparation of coffee on a large The figure is a general view of a coffeev scale and is entirely free from the objecurn and connected parts showing the inventions which apply lo the existing types of 80 tion. coffee urns of which I am aware.

In the ordinary method of preparing an I am informed that heretofore there have infusion of coffee ou a large scale, it is usual existed appliances for preparing coffee in to pour boiling water through the ground which a re-pouring of the incomplete infuo'ee contained in a porous or perforated Sion is effected by means of a suction pump 85 receptacle, the infusion being received in the generally located at or near the level of the urn, in the upper part of which such recepreceptacle for the ground coffee, but in these tacle is generally situated. In order to make devices, with the valves necessary for their the infusion sufficiently strong, it is the pracoperation, the preparation of coffee on a tice to withdraw it from the urn and repour large scale has not been satisfactory. Un- 9o it through the ground coffee as offen as may less interstices of the coffee container are eX- be necessary. In order to facilitate this tremely small, in which case the process is process in the present invention, I provide inconvenientl lengthened, a considerable a centrifugal pump located preferably beproportion ot the finely ground coffee finds neath the urn and adapted to withdraw the its way into the urn and either clogs the 95 i0 liquid therefrom and discharge it again valves or prevents them from properly actupon the ground codec or other material in ing. The presence of these particles 0f the porous or perforated container. As my ground coffee in the infusion also renders it invention is particularly adapted for the impracticable to use a pump with closely fitpreparation of infusions on a comparatively ting parts, since at certain stages in the lOJ ,large scale, I preferably drive the centrifupreparation of coffee, particularly with a gal pump, which, of course, operates at a very porous coffee container, the liquid will relativelyl high speed, by a small electric have a large per cent. of solid mattei' in susmotor. pension, which generally embraces a certain In the drawing, which shows the coHee proportion of grit or other hard matter. In 105 urn of the class generally used in hotels, my apparatus, however, byproviding a cenrestaurants and the like, the principal parts trifugal pump which has neither valves nor are illustrated in section. l closely fitting parts and which can work. l is an urn or container for the infusion, efliciently with an excessive amount of solid shown surrounded by the usual jacket 2; 3 mattei' in suspension in the liquid, I entirely 110 is the receptacle for the ground coffee, avoid all ofthe defects of former apparatus usually a bag lof textile material provided for the purpose. By locating the pump bethe neath the level of the urn, the tendency of the sediment is to flow into the pump and thence be discharged upon the mass of ground coffee. In practice, the eifect of the re-pouring of the liquid and the pumping over of the liner particles which pass through thepores or.perforations of the coffee container, is to produce an infusion whichvis practically free from solid matter in suspension. The finer particles become deposited in a layer upon the top of the coifee in the container and in a manner act as a ilter bed, so that after a sufficient number of re-pourings have been effected, the resulting infusion is almost entirely free from any solid matter whatever, with the result so much to be desired that the coffee is remarkably clear. and not opaque or muddy as with the devices heretofore in use.

Another distinct and important advantage of the present invention lies in the fact that the circulating means are capable of satisfactorily re-pouring liquids at high temperatures. It is found 1n practice that pumps of the suction type in which the vacuum 1s relied upon to keep the pump supplied are eX- tremely unsatisfactory with liquids of a texmperature near boiling point. As will be readily understood, with the liquid at or near boiling point, (which is the condition in the manufacture of coffee) a suction pump merely draws steam or vapor from the liq. uid without drawing the liquid itself. It

therefore' becomes necessary to employ apump, the feeding of which is entirely independentl of suction. By providing beneath level of the liquid a 'valveless pum which is entirely independent of suction an supplied by the hydrostatic head of the liquid, I not. only obviate the diiiiculties heretofore encountered with suction pumps, but

gain the other advantages hereinbefore set Systems have been suggested for apparatus of this class in which suction pumps of different types have been embraced, but, so far as I am aware, in all of these instances the pumps were located in such a position that they would of necessity have been entirely inoperative with the liquid anywhere' near the boiling point.

Having described my invention, what I claim is 1. A coffee urn having an outlet in the bottom thereof, a connection from said outlet to the upper part of the urn, a centrifugal pump located in said connection below the level of the bottom of the urn, and an oiltake for the fluid between the pump and the bottom of the urn.

2. A coffee urn having an outlet in the bottom thereof, a connection from said outlet to the top of the urn, and a centrifugal ump in said connection below the level of the bottom of the urn for lifting the fluid and sediment from the bottom to the top of the urn.

3. A codec urn having an outlet in the bottom thereof, a connection from said outlet into which the sediment at the bottom of the urn may pass by gravity,said connection leadino into the urn again at the upper partthereo and a. valveless ump in said connection below the level o the bottom of the urn for forcing the Huid and sediment through the connection.

Signed by me at city, county and State of New York this 14 day of March, 1908.

FREDERIC A. CAUCHOIS.

Witnesses:

yFRANK B. GREEN, y

J. FREDERICK WooDWoRTH.

forth. I am aware that various circulating 

